Update correlatorDplusHadrons.cxx

acceptance cut on D+ daughters as Run2

Author: Simple-Shyam

PWGHF/HFC/TableProducer/correlatorDplusHadrons.cxx

@@ -182,6 +182,7 @@ struct HfCorrelatorDplusHadrons {
   Produces<aod::Dplus> entryDplus;
   Produces<aod::Hadron> entryHadron;
   static constexpr std::size_t NDaughters{3u};
+  static constexpr float kEtaDaughtersMax{0.8f}; // Eta cut on daughters of D+ meson as Run2
 
   Configurable<int> selectionFlagDplus{"selectionFlagDplus", 7, "Selection Flag for Dplus"}; // 7 corresponds to topo+PID cuts
   Configurable<int> numberEventsMixed{"numberEventsMixed", 5, "Number of events mixed in ME process"};
@@ -577,13 +578,15 @@ struct HfCorrelatorDplusHadrons {
       listDaughters.clear();
       RecoDecay::getDaughters(particle1, &listDaughters, arrDaughDplusPDG, 2);
       int counterDaughters = 0;
-      if (listDaughters.size() == NDaughters) {
+      if (listDaughters.size() != NDaughters) continue;
+        bool isDaughtersOk = true;
         for (const auto& dauIdx : listDaughters) {
           auto daughI = mcParticles.rawIteratorAt(dauIdx - mcParticles.offset());
+          if (std::abs(daughI.eta()) >= kEtaDaughtersMax) { isDaughtersOk = false; break; }
           counterDaughters += 1;
           prongsId[counterDaughters - 1] = daughI.globalIndex();
         }
-      }
+      if (!isDaughtersOk) continue; // Skip this D+ candidate if any daughter fails eta cut
       counterDplusHadron++;
       // Dplus Hadron correlation dedicated section
       // if it's a Dplus particle, search for Hadron and evaluate correlations